Search found 53 matches

by geogeo_28
Sun Feb 07, 2021 11:25 pm
Forum: HARDWARE ISSUES
Topic: Issue writing data on floppy (Write protected)
Replies: 41
Views: 1733

Re: Issue writing data on floppy (Write protected)

This has all the signs of noise then... I'm not sure there will be a solution other than change the STE motherboard and start again. Diagnosing such faults can take a incredible amount of time and it pretty much always comes back to the bad grounding on the motherboard itself. Such faults appear qu...
by geogeo_28
Sun Feb 07, 2021 11:07 pm
Forum: HARDWARE ISSUES
Topic: Issue writing data on floppy (Write protected)
Replies: 41
Views: 1733

Re: Issue writing data on floppy (Write protected)

Just tested this software on ASCI ID 0 and obtain a bunch of '*'.
No read/write error. :/
IMG_0719.jpeg
IMG_0719.jpeg (71.56 KiB) Viewed 136 times
IMG_0718.jpeg
IMG_0718.jpeg (78.1 KiB) Viewed 136 times
by geogeo_28
Sun Feb 07, 2021 7:58 am
Forum: MEMBER BLOGS
Topic: Paradroid STE DMA issue blog
Replies: 70
Views: 1854

Re: Paradroid STE DMA issue blog

As a bonus, I tried a diode on the VCC of the DMA, same issue. :roll:
by geogeo_28
Sun Feb 07, 2021 7:57 am
Forum: MEMBER BLOGS
Topic: I'm a big boy now!
Replies: 9
Views: 293

Re: I'm a big boy now!

:dualthumbup: :yay: :coffee: :ugeek:
by geogeo_28
Sun Feb 07, 2021 6:24 am
Forum: MEMBER BLOGS
Topic: Paradroid STE DMA issue blog
Replies: 70
Views: 1854

Re: Paradroid STE DMA issue blog

exxos wrote:
Sat Feb 06, 2021 10:03 am
Hmmm. Try a 390pf on A1 on the DMA chip,, see what chaos that causes..
No change.
The signal looks better but still issue to write data on UltraSatan at 8 MHz.
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IMG_0717.jpeg (91.63 KiB) Viewed 181 times
by geogeo_28
Sat Feb 06, 2021 7:52 am
Forum: MEMBER BLOGS
Topic: Paradroid STE DMA issue blog
Replies: 70
Views: 1854

Re: Paradroid STE DMA issue blog

And finally A1:

At 8 MHz:
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IMG_0711.jpeg
IMG_0711.jpeg (101.94 KiB) Viewed 256 times
At 32 MHz:
IMG_0707.jpeg
IMG_0707.jpeg (87.97 KiB) Viewed 258 times
IMG_0710.jpeg
IMG_0710.jpeg (93.17 KiB) Viewed 256 times
Definitely at 32 MHz, the signal is much faster and seems cleaner.

We can even see the 'spike' around 2.5V at 8MHz, which does not appear at 32 MHz..
by geogeo_28
Sat Feb 06, 2021 7:37 am
Forum: MEMBER BLOGS
Topic: Paradroid STE DMA issue blog
Replies: 70
Views: 1854

Re: Paradroid STE DMA issue blog

I am ready to try any new firmware of the UltraSatan ;)
Running out of idea on my side. ^^
by geogeo_28
Sat Feb 06, 2021 7:35 am
Forum: MEMBER BLOGS
Topic: Paradroid STE DMA issue blog
Replies: 70
Views: 1854

Re: Paradroid STE DMA issue blog

R/W of the DMA at 8 MHz:
IMG_0702.jpeg
IMG_0702.jpeg (86.82 KiB) Viewed 261 times
R/W of the DMA at 32 MHz:
IMG_0703.jpeg
IMG_0703.jpeg (88.98 KiB) Viewed 261 times
by geogeo_28
Sat Feb 06, 2021 7:26 am
Forum: MEMBER BLOGS
Topic: Paradroid STE DMA issue blog
Replies: 70
Views: 1854

Re: Paradroid STE DMA issue blog

No jazz... Infact a little worse as it corrupted in both 32mhz and 8mhz modes. But still an interesting result, showing that the ASCI device can influence the result. PXL_20210204_133052831.jpg Just thinking out loud. As @exxos said it makes no sense for the Ultrasatan to be working in 32mhz but no...
by geogeo_28
Sat Feb 06, 2021 7:15 am
Forum: HARDWARE ISSUES
Topic: Issue writing data on floppy (Write protected)
Replies: 41
Views: 1733

Re: Issue writing data on floppy (Write protected)

exxos wrote:
Fri Feb 05, 2021 12:25 am
Have you tried running emutos from floppy to see if you still get corruption ?
Here it is:

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